Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

v3.8.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
USD ($)
Branch
Loan
InterestRateSwap
Segment
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]        
Number of full service branch offices | Branch   26    
Securities [Abstract]        
OTTI charges   $ 0 $ 0 $ 0
Federal Home Loan Bank (FHLB) Stock [Abstract]        
FHLB stock impaired   0    
Loans Held-for-sale [Abstract]        
Net unrealized gain on loans held for sale   $ 21,000 28,000  
Loans [Abstract]        
Period after which interest income on delinquent loans is discontinued   90 days    
Past due period after which loans are charged off   120 days    
Goodwill and Acquired Intangible Assets [Abstract]        
Goodwill   $ 0 0  
Finite-Lived Intangible Assets [Line Items]        
Acquired intangible   0 0  
Long-Term Assets [Abstract]        
Impairment of long term assets   0 0  
Mortgage Banking Derivatives [Abstract]        
Net fair value of mortgage banking derivatives   $ 5,000 $ 51,000  
Income Tax Disclosure [Line Items]        
Corporate federal income tax rate   35.00% 35.00% 35.00%
Reduction in earnings resulting from re-measurement of deferred tax assets and liabilities   $ (2,500,000)    
Restrictions on Cash [Abstract]        
Cash on hand or on deposit with the Federal Reserve Bank   $ 6,084,000 $ 5,610,000  
Stock Splits and Dividends [Abstract]        
Stock dividends, excess of threshold   20.00%    
Stock dividend threshold or less   20.00%    
Segment Reporting [Abstract]        
Number of operating segments | Segment   1    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Trust and investment management fees   $ 3,277,000 3,096,000 $ 2,927,000
Minimum [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated useful life of intangible assets   10 years    
Maximum [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated useful life of intangible assets   16 years    
Residential Mortgage [Member]        
Allowance for Loan Losses [Abstract]        
Period of historical loss experience applied to loans for estimating allowance for general component of non-classified loans   12 months    
Plan [Member]        
Income Tax Disclosure [Line Items]        
Corporate federal income tax rate 21.00%      
Building and Related Components [Member] | Minimum [Member]        
Property, Plant and Equipment [Line Items]        
Useful lives   5 years    
Building and Related Components [Member] | Maximum [Member]        
Property, Plant and Equipment [Line Items]        
Useful lives   40 years    
Furniture Fixture and Equipment [Member] | Minimum [Member]        
Property, Plant and Equipment [Line Items]        
Useful lives   3 years    
Furniture Fixture and Equipment [Member] | Maximum [Member]        
Property, Plant and Equipment [Line Items]        
Useful lives   15 years    
Commercial [Member]        
Allowance for Loan Losses [Abstract]        
Period of historical loss experience applied to loans for estimating allowance for general component of non-classified loans   18 months    
Threshold balance of loans evaluated for impairment   $ 500,000    
Commercial [Member] | Minimum [Member]        
Allowance for Loan Losses [Abstract]        
Internal risk grading of loans evaluated for impairment | Loan   6    
Commercial Real Estate [Member]        
Allowance for Loan Losses [Abstract]        
Threshold balance of loans evaluated for impairment   $ 500,000    
Commercial Real Estate [Member] | Minimum [Member]        
Allowance for Loan Losses [Abstract]        
Internal risk grading of loans evaluated for impairment | Loan   6    
Consumer [Member]        
Allowance for Loan Losses [Abstract]        
Period of historical loss experience applied to loans for estimating allowance for general component of non-classified loans   12 months    
Swap [Member] | Interest Rate Swap [Member]        
Derivatives [Abstract]        
Number of freestanding interest rate swaps | InterestRateSwap   2    
Notional amount of agreements   $ 42,300,000 48,100,000  
Derivative asset fair value   197,000 494,000  
Trading liability fair value   $ 197,000 $ 494,000  
Commercial Real Estate [Member]        
Concentration Risk [Line Items]        
Concentration of credit risk   41.00%    
Commercial [Member]        
Concentration Risk [Line Items]        
Concentration of credit risk   35.00%    
Residential Real Estate and Consumer Loans [Member]        
Concentration Risk [Line Items]        
Concentration of credit risk   24.00%    
Accounting Standards Update 2014-09 [Member] | Maximum [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Trust and investment management fees   $ 60,000